Mark Lumsden (ORNL) The ORNL Spallation Neutron Source

Wednesday 25 Aug 2021, 12:00 → 13:00 US/Pacific

zoom link https://lbnl.zoom.us/j/97341258188

Abstract: 
Oak Ridge National Laboratory is home to two world-class neutron sources: the High Flux Isotope Reactor (HFIR) and the Spallation Neutron Source (SNS). HFIR is an 85 MW continuous source of neutrons and SNS is a 1.4 MW pulsed neutron source. The two types of neutron sources, continuous and pulsed have unique advantages allowing for an optimized suite of instruments. While reactor based instruments are conceptually similar to instruments at x-ray facilities, pulsed source instruments operate in a different manner by measuring neutron time-of-flight. An overview of the basic operation and components of such instruments at SNS will be presented - this description naturally explains the advantages of pulsed source instruments. Recent science examples will be presented to demonstrate the experimental opportunities available at SNS / HFIR. Finally, a new Second Target Station for SNS will provide a new set of world leading instruments to the scientific user community.

Short bio: 
Mark Lumsden received his PhD from McMaster University in Hamilton, Ontario Canada in 1999 and joined Oak Ridge National Laboratory (ORNL) as a Eugene P. Wigner Fellow (1999-2001). In 2001 he joined the neutron scattering group at the High Flux Isotope Reactor (HFIR) where he was an instrument scientist on the HB-3 triple-axis spectrometer until 2011. He then served as a Group Leader until 2020 and is currently the Spectroscopy Section Head in the Neutron Scattering Division. This section operates 10 world class neutron spectroscopy instruments and HFIR and SNS. Mark’s research concentrates on using neutron scattering to study the fundamental properties of magnetic and quantum materials. He is a Fellow of the American Physical Society (2015) and a Fellow of the Neutron Scattering Society of America (2018).